Quote:
Originally Posted by tuatua
We have just over 15000 miles on our 2015 X3 28d. With 40 fill ups, overall mpg from Fuelly is 33.3 with 70% highway/30% city (very free flowing; very little stop and go). Best tank was 42.1 mpg -- steady 45 mph for a couple hundred miles. Worst tank was 27.8 mpg -- steady 90 mph on the interstate in Montana.
Seems X3 28d mpg really takes a hit in stop and go traffic and speeds over 75-80 mph.
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To be honest that is to be expected. The best figures will always be attained at the approximate speeds that the official figures were quoted for and if I may say were rigged (manipulated or contrived) as the official figures
Perhaps not a good comparison, but my late 2013 X3 xDrive30d M Sport (3.0 litre Turbo diesel developing 258 bhp, has achieved 41.1 mpg on long runs and 32 mpg city driving. Since I have been running it, it has averaged 37.2 mpg using fuelly. Remember this is the full size imperial gallon. Perhaps the 31.0 mpg you see below is the US corrected figure.